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Question

The instantaneous value of emf and current in an
A.C. circuit are; E=1.414sin(100πtπ4) ,
I=0.707sin(100πt) . The current,

A
leads the voltage by 450
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B
lags behind the voltage by 450
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C
leads the voltage by 900
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D
lags behind the voltage by 900
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Solution

The correct option is A leads the voltage by 450
I=0.707sin(100πt)
V=1.414sin(100πtπ4)
So, current leads voltage by 450.

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